text: Dogwood trees are flowering trees that reach a height range of 15 to 40 feet. When grown in the sun, these deciduous trees reach a height of 15 to 20 feet, but when grown in the shade, they grow up to 40 feet.Tree width equals or exceeds the height.ornelian Cherry Dogwood. Cornelian cherry dogwood trees (C. mas) grow to a height of 20 to 25 feet with a width of 15 to 20 feet, according to the Clemson University Extension. This species displays showy flowers during the end of winter and beginning of spring.